Updating a very, very old Negri Bossi
Updating a very, very old Negri Bossi
(OP)
We are installing a microprocessor based controller on an old "Piston - non screw" Negri Bossi R5 machine.
Has anyone "out there" have any experience with this machine ?
What purpose does retracting the barrel from mold contact between cycles , have ? Better Cooling ?
Has anyone "out there" have any experience with this machine ?
What purpose does retracting the barrel from mold contact between cycles , have ? Better Cooling ?






RE: Updating a very, very old Negri Bossi
... on the other hand, retracting the barrel on every cycle introduces some complexity.
Since you're adding fancy controls, you could presumably program the machine to work either way, and see how it works out for you.
Mike Halloran
Pembroke Pines, FL, USA
RE: Updating a very, very old Negri Bossi
Often used to keep nozzle tip hot to stop it freezing off and preventing injection on next cycle. Also used with some materials to stop "stringing" of the sprue when tool opens, causing the runner system to hang in the tool.
I would suggest it's important.
H
www.tynevalleyplastics.co.uk
It's ok to soar like an eagle, but weasels don't get sucked into jet engines.